Not sure if it's duplicate, but when I have the document not in the main MDI but floating then the Preview doesn't work.
SlickEdit Pro 2021 (v26.0.1.0 64-bit Qt5)
Serial number: WB951378
Licensed number of users: Single user
License file: C:\ProgramData\slickedit\26\slickedit.lic
Build Date: December 13, 2021 (State file: January 10, 2022)
Emulation: CUA
OS: Windows 10 x64
OS Version: 10.00.0
Memory: 21% Load, 6899MB/32475MB Physical, 7989MB/32475MB Page File, 4632MB/134217727MB Virtual
Shell Information: C:\WINDOWS\system32\cmd.exe /q
Screen Size: 1920 x 1200 (0 0 1920 1200), 1920 x 1080 (1920 0 1920 1080), 1920 x 1080 (-1920 0 1920 1080)
Project Type: Single file project - Other
Language: No file open
Encoding: No file open
Installation Directory: D:\tools\totalcmd\Tools\dev\SlickEdit\core\26.0.1\ (non-removable drive,NTFS,91394MB free)
Configuration Directory: D:\tools\totalcmd\Tools\dev\SlickEdit\config\26.0.1\ (non-removable drive,NTFS,91394MB free)
Hotfixes:
D:\tools\totalcmd\Tools\dev\SlickEdit\config\26.0.1\hotfixes\hotfix_se2601_2_cumulative.zip (Revision: 2)